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Electric Circuits

Electric Circuits
Rms value is defined based on which of the following?

 Charge transfer
 Heating effect
 Voltage
 Current

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Electric Circuits
In balanced bridge, if the positions of detector and source are interchanged, the bridge will still remain balanced. This can be explained from which theoem

 Reciprocity theorem
 Thevinin's theorem
 Norton's theorem
 Compensation theorem

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Electric Circuits
Advantage of active filter is

  derive high impedance load.
  easy to tune.
  both of above.
  do not offer gain.

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Electric Circuits
Which of the following lamp has least resistance ?

  25 W, 220 V.
  200 W, 220 V.
 100 W, 220 V.
  60 W, 220 V.

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Electric Circuits
In direct arc furnace which of following is of high value?

 All of above.
 Current.
 Power factor.
 Voltage.

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Electric Circuits
Two identical resistors are first connected in parallel then in series. The ratio of resultant resistance of the first combination to the second will be

 0.5.
 2.
 4.
 0.25.

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